GUARDIANAYour data, under your control
EN
Start

X-RAY · 17 SEPTEMBER 2026

Amazon, Walmart, eBay, ESPN, Weather.com and Yahoo: how much tracking each front page loads

Six US websites everybody uses, opened one by one in a freshly installed Chrome, 20 seconds each, with GUARDIANA recording every name the front page made the machine ask for. How many advertising, tracking and telemetry names each one loads.

How to read this. GUARDIANA writes down every name the machine asks to resolve (DNS). It sees names, not content. Here each front page was opened alone, in a clean browser measured from the inside; what is counted is the names the page asked for, and whatever other apps on the test machine resolved during that time is left out. Websites change their advertisers every day: this holds for the date above.

The record

Scoreboard

How many advertising, tracking and telemetry names each site loads in 20 seconds of its front page, out of the 200 distinct ones seen across the whole test.

SiteAdvertising, tracking and telemetryIts own domainsDistinct names in totalLoads the least
Amazon29851
Walmartnot measurable on equal terms (see its section)—
eBay171241
ESPN8419136
Weather.com15431yes
Yahoo14617243

In this test the one loading the least tracking was Weather.com (15 names against 146 for the one loading most). It is a result of these front pages on this day, not a general verdict.

What it says

The shop and weather front pages load far less than the news ones: Amazon 29 advertising and tracking names, eBay 17 and Weather.com 15, almost all of them Amazon and Google ad networks and identity synchronisers. ESPN (84) and Yahoo (146) look like a newspaper. Yahoo is also an ad network itself: several of the tracking names the other sites load are Yahoo's (analytics.yahoo.com, pbs.yahoo.com), and on its own front page those count as its own. Walmart could not be measured: to an externally driven browser it shows a “robot or human?” check instead of the shop.

What only a guardian on the machine sees

The browser shows the page; GUARDIANA writes down every name the page makes the machine ask for, including the ones no content blocker ever shows you:

Detail

MeasureAmazonWalmarteBayESPNWeather.comYahoo
Distinct names that left the machine51204113631243
· advertising22296314127
· trackers72821119
· telemetry000000
· on no list that knows them221624521697
Advertising + trackers + telemetry294178415146
The site's own domains861219417
Requests the pages made (distinct names)50173813430239
Names the browser blocked000000
Blocked names that reached the DNS anyway000000
The machine's other services in that time (other apps; not published)181928191940
Attempts to use someone else’s encrypted DNS (the “DNS evasion” signal)000000
Measured from the inside (DevTools)yesyesyesyesyesyes

Amazon

amazon-adsystem.com is Amazon's own ad network. Here it counts as advertising rather than as a domain of its own, because the open lists classify it that way and it turns up on other companies' sites too.

Advertising, tracking and telemetry it loads (29)

The twenty with the most queries; the rest is in the data.

Its own domains (8)

Walmart

Not comparable: to a browser driven from outside, Walmart shows a “robot or human?” check (PerimeterX, px-cloud.net) instead of its front page. Its figure measures that screen, not the shop.

Advertising, tracking and telemetry it loads (4)

The twenty with the most queries; the rest is in the data.

Its own domains (6)

eBay

Advertising, tracking and telemetry it loads (17)

The twenty with the most queries; the rest is in the data.

Its own domains (12)

ESPN

Advertising, tracking and telemetry it loads (84)

The twenty with the most queries; the rest is in the data.

Its own domains (19)

Weather.com

Advertising, tracking and telemetry it loads (15)

The twenty with the most queries; the rest is in the data.

Its own domains (4)

Yahoo

From Colombia, yahoo.com opens espanol.yahoo.com. Many of the tracking names the other sites load belong to Yahoo (analytics.yahoo.com, pbs.yahoo.com): here they count as its own, and on the others as tracking.

Advertising, tracking and telemetry it loads (146)

The twenty with the most queries; the rest is in the data.

Its own domains (17)

What can be claimed

What cannot be claimed

What you can switch off

Data and method

Full data: seis-webs-de-eeuu-2026-09-17.csv. Method: each site opened alone with site/src/radiografia/navegar.mjs (Chrome, empty profile, no scrolling, 20 s + 15 s); names taken from the machine's GUARDIANA ledger for each time window, this machine's queries only; only the ones the page asked for are counted. The tools are in the program's repository (site/src/radiografia/); anyone can repeat the test with GUARDIANA installed.

Brands named as the names of their owners. If you are the owner and something here is inaccurate, write to hola@guardianagroup.com: it is corrected, with the date.

All x-rays

See it with any website. In the ZERO browser, the X-ray shows you who each page talks to, with no account. Enter →